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Isosceles Triangles

Description

In this lesson students explore and use the properties of isosceles triangles to solve real world problems. After learning the basics of isosceles triangles they apply what they learn to the structure of the Eiffel Tower.

A video introduces the topic of isosceles triangles, along with two isosceles triangle theorems. Students are shown how to find the values for the isosceles pair, given the third angle, by solving a multi-step equation.

Students then apply what they have learned about isosceles triangles by learning about the triangular trusses in the Eiffel Tower. Students learn about what a truss is, what their function is in a building, and why isosceles triangle trusses are an effective form of a truss. Students then learn about two important properties of isosceles triangles involve the perpendicular bisector of the base and the angle bisector of the third angle. Another video ties together triangular trusses, perpendicular bisectors, and angle bisectors.

Students then complete a cloze assessment, in which they identify key words that are missing from a reading passage. 

This module can be used as an introductory lesson on isosceles triangles in a middle school geometry unit. The content aligns with grade 7 Core State Standards, but this module can be used as a refresher for higher grades.

This module can be assigned to individual students or groups of students. Students should be able to complete this lesson in 20 minutes.

Math Concepts

  • Triangles
  • Equations

Learning Objectives

  • Define what an isosceles triangle is
  • Describe the isosceles triangle theorems
  • Solve real world problems using isosceles triangles

Prerequisite Skills

  • Basic knowledge of triangles
  • Solving multi-step equations
Common Core Standards CCSS.MATH.CONTENT.7.G.B.5
Lesson Duration 20 mins
Grade Range 6th - 7th Grade

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About M4M

About Media4Math

Our Mission

Media4Math's mission is to educate 21st-century students in real-world applications of math with digital technology. We bring math to life in your classroom with a rich blend of resources to inspire your students to learn. Our philosophy is that the procedural side of math is a prerequisite to using it, but we also find that real-world math applications can provide motivation and even inspiration for math students. Math is its own language and it has important stories to tell. While many of our resources are for procedural skills, there are many resources that are real-world applications of math. Some of these resources rely on partnerships with other educational publishers.

About Media4Math Library

Media4Math Library contains over 15,000 high-quality resources designed for classroom or home use. This includes instructional, remediation, and assessment resources. You'll find truly innovative resources that bring math to life. Resources in Media4Math Library include:

  • Videos
  • Math Clip Art
  • Math Examples
  • Quizzes
  • Tutorials
  • PowerPoint and Google Slide presentations
  • GoogleEarth Voyager Stories
  • Algebra Applications
  • Geometry Explorations
  • Quizlet Flash Cards
  • Desmos Resources
  • Texas Instrument Resources
  • Games and Simulations

About Media4Math Classroom

Media4Math Classroom provides ready-to-use interactive math lessons that teach, assess, and provide real-world applications of topics in Pre-Algebra, Algebra, and Geometry. Assign these modules to your students and capture assessment scores in an easy-to-use Dashboard. This is a growing library of instructional modules. Topics include:

  • Arithmetic
  • Pre-Algebra
  • Algebra
  • Geometry
  • SAT Math Prep

Media4Math Classroom modules provide real world applications of math that will motivate your students. Here are some examples:

  • Construction Site Math. Apply ratios and proportions to mixtures of cement and concrete. This module includes video resources and your students will get a real-world application of ratios and proportions.
  • Counting Bison. Apply place value concepts to the real-world application of the bison population. Because the bison population has gone through dramatic changes in population, this become an opportunity to use and apply place value.
  • Wildlife Refuge. This study of area and perimeter centers on the mustang population in the Nevada area. Students explore the relationship between area and perimeter of rectangular shapes in the context of designing a wildlife refuge.

The Media4Math Bundle

A subscription to the Media4Math bundle gives teachers access to all the resources listed above. Specifically:

  • Access to all the Media4Math Library resources and tools.
  • Access to all the Media4Math Classroom instructional modules.

To learn more about our subscription packages, contact us at admin@media4math.com.

Partnering with Media4Math

Media4Math prides itself on its strategic partnerships with other educational organizations. Our partnerships include the following partners:

  • Google Earth. Media4Math has partnered with GoogleEarth to create a comprehensive library of GoogleEarth Voyager Stories. These map-based explorations of geometry, geography, and culture will literally bring the math to life. See our collection of Voyager Stories by clicking on this link to the Google Earth resources. 

    Link to the GoogleEarth site.

  • Texas Instruments. TI is the leading provider of graphing calculators used in the classroom. Media4Math has partnered with TI to create a library of digital resources to support the use of these graphing calculators. These resources include videos, presentations, and related tutorials. See our collection of TI resources by clicking on this link to the TI resources. 

    Link to the Media4Math publisher page on the TI site.

  • Desmos. This free online resource that includes a graphing calculator and geometry tools. Media4Math has created an extensive library of resources that support the use of these Desmos resources. See our collection of Desmos resources by clicking on this link to the Desmos resources.

    Link to the Desmos site.

  • Quizlet. We have partnered with the leading provider of interactive Flash Cards and is used by millions of teachers and students around the world. Media4Math has developed an extensive library of Quizlet resources. See our collection of Quizlet resources by clicking on this link to the Quizlet resources.

    Link to the Media4Math Study Sets on Quizlet and search for "Media4Math."

  • The Princeton Review. The Princeton Review is the leading provider of SAT prep and other test preparation courses and tutorials. Media4Math is an affiliate of Princeton Review and we have created a set of free SAT math resources, sponsored by Princeton Review. See this collection of SAT resources by clicking on this link to the Princeton Review resources.

    Link to the Princeton Review site.

If you would like to partner with Media4Math, please reach out to us at admin@media4math.com.


 

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